//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03 && !stdlib=libc++

// <vector>

// template <class... Args> iterator emplace(const_iterator pos, Args&&... args);

#include <vector>
#include <cassert>

#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"
#include "asan_testing.h"

class A {
  int i_;
  double d_;

  A(const A&);
  A& operator=(const A&);

public:
  TEST_CONSTEXPR_CXX14 A(int i, double d) : i_(i), d_(d) {}

  TEST_CONSTEXPR_CXX14 A(A&& a) : i_(a.i_), d_(a.d_) {
    a.i_ = 0;
    a.d_ = 0;
  }

  TEST_CONSTEXPR_CXX14 A& operator=(A&& a) {
    i_   = a.i_;
    d_   = a.d_;
    a.i_ = 0;
    a.d_ = 0;
    return *this;
  }

  TEST_CONSTEXPR_CXX14 int geti() const { return i_; }
  TEST_CONSTEXPR_CXX14 double getd() const { return d_; }
};

TEST_CONSTEXPR_CXX20 bool tests() {
  {
    std::vector<A> c;
    std::vector<A>::iterator i = c.emplace(c.cbegin(), 2, 3.5);
    assert(i == c.begin());
    assert(c.size() == 1);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(is_contiguous_container_asan_correct(c));
    i = c.emplace(c.cend(), 3, 4.5);
    assert(i == c.end() - 1);
    assert(c.size() == 2);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    assert(is_contiguous_container_asan_correct(c));
    i = c.emplace(c.cbegin() + 1, 4, 6.5);
    assert(i == c.begin() + 1);
    assert(c.size() == 3);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c[1].geti() == 4);
    assert(c[1].getd() == 6.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    assert(is_contiguous_container_asan_correct(c));
  }
  {
    std::vector<A, limited_allocator<A, 7> > c;
    std::vector<A, limited_allocator<A, 7> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
    assert(i == c.begin());
    assert(c.size() == 1);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(is_contiguous_container_asan_correct(c));
    i = c.emplace(c.cend(), 3, 4.5);
    assert(i == c.end() - 1);
    assert(c.size() == 2);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    assert(is_contiguous_container_asan_correct(c));
    i = c.emplace(c.cbegin() + 1, 4, 6.5);
    assert(i == c.begin() + 1);
    assert(c.size() == 3);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c[1].geti() == 4);
    assert(c[1].getd() == 6.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    assert(is_contiguous_container_asan_correct(c));
  }
  {
    std::vector<A, min_allocator<A> > c;
    std::vector<A, min_allocator<A> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
    assert(i == c.begin());
    assert(c.size() == 1);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    i = c.emplace(c.cend(), 3, 4.5);
    assert(i == c.end() - 1);
    assert(c.size() == 2);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    i = c.emplace(c.cbegin() + 1, 4, 6.5);
    assert(i == c.begin() + 1);
    assert(c.size() == 3);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c[1].geti() == 4);
    assert(c[1].getd() == 6.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
  }
  {
    std::vector<A, safe_allocator<A> > c;
    std::vector<A, safe_allocator<A> >::iterator i = c.emplace(c.cbegin(), 2, 3.5);
    assert(i == c.begin());
    assert(c.size() == 1);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    i = c.emplace(c.cend(), 3, 4.5);
    assert(i == c.end() - 1);
    assert(c.size() == 2);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
    i = c.emplace(c.cbegin() + 1, 4, 6.5);
    assert(i == c.begin() + 1);
    assert(c.size() == 3);
    assert(c.front().geti() == 2);
    assert(c.front().getd() == 3.5);
    assert(c[1].geti() == 4);
    assert(c[1].getd() == 6.5);
    assert(c.back().geti() == 3);
    assert(c.back().getd() == 4.5);
  }

  return true;
}

int main(int, char**) {
  tests();
#if TEST_STD_VER > 17
  static_assert(tests());
#endif
  return 0;
}
